HTML/CSS - Senior Developers - AI Training - USA

prolificacademicltd; United States; Remote; USD 45,000 - 65,000; Full time

Job summary

prolificacademicltd is seeking a senior frontend engineer to help train and evaluate AI systems by judging the quality of HTML/CSS, accessibility, and the soundness of model explanations related to engineering practice.

You will review generated code across environments, assess layout decisions, and provide feedback on components and design systems. Remote work is possible after a brief skills assessment, with rates up to $40/hour based on skills and experience.

Qualifications

• Bachelor’s degree in computer science, software engineering, web development, or related field.
• Senior frontend or UI engineering experience focusing on HTML and CSS.
• Ability to create complex responsive layouts and components without frameworks.
• Expert knowledge of CSS fundamentals, including cascade, specificity, Flexbox, and Grid.
• Strong accessibility, browser compatibility, semantic markup, and maintainable CSS conventions.
• Proficiency with modern HTML and CSS standards and browser developer tools.

Responsibilities

• Check generated HTML and CSS for functional accuracy, semantic structure, and code quality.
• Review explanations of layout and styling choices for sound reasoning.
• Run generated code in suitable environments and inspect visual results across browsers.
• Identify accessibility problems, inefficient selectors, outdated attributes, and unsupported CSS.
• Give structured feedback on responsive implementation, component design, and design systems.

Skills

Frontend expertise

HTML

CSS

Accessibility

Browser tools

Education

Bachelor’s degree in CS or related field

Tools

Browser developer tools

Job description

Role overview

Use senior frontend experience to help train and evaluate AI systems through paid, task-based work. The focus is on judging whether generated HTML and CSS produce sound, accessible interfaces and whether the model’s explanations reflect reliable engineering practice.

Responsibilities

• Check generated HTML and CSS for functional accuracy, semantic structure, and code quality.
• Review explanations of layout and styling choices for sound reasoning.
• Run generated code in suitable environments and inspect visual results across browsers.
• Identify accessibility problems, inefficient selectors, outdated attributes, and unsupported CSS.
• Give structured feedback on responsive implementation, component design, and design systems.

Requirements

• A bachelor’s degree or higher in computer science, software engineering, web development, or a closely related field.
• Professional experience in a senior frontend or UI engineering role specializing in HTML and CSS.
• Ability to create complex responsive layouts and components independently, without depending on frameworks or libraries.
• Expert knowledge of CSS fundamentals and modern layout techniques, including the cascade, specificity, Flexbox, and Grid.
• Strong grasp of accessibility standards, browser compatibility, semantic markup, and maintainable CSS conventions.
• Proficiency with modern HTML and CSS standards and browser developer tools.

Nice to have

• Experience with Tailwind CSS, Sass/SCSS, CSS Modules, component-driven design systems, accessibility audit tools, or cross-browser testing tools.

Benefits and work setup

• Flexible remote participation is available after passing a brief skills assessment.
• Tasks are paid and may require up to an hour of uninterrupted work, though many take less time. Rates are listed as up to $40 per hour, based on skills and experience.